@outlawrenegade: Arkham City is open world. You have a fairly big area that you can fully explore. That's the definition of open world. And it's more or less universally accepted that when we're talking about Superman game ideas, we're talking about open world. Having Supermans power at your disposal, and you're locked down to limited, linear levels. Not terrible interesting.
And fine, let's base him off the Animated Series. I just figured when we ask for a Superman game on a comicbook forum, we're talking about a comicbook adaptation.
But hey, slowing down the entire world. Decent idea. Do that.